When I send a request to a webserver using netty. I get the following exception. What can cause this exception ?
java.io.IOException: Connection reset by peer
at sun.nio.ch.FileDispatcherImpl.read0(Native Method) ~[na:1.7.0_25]
at sun.nio.ch.SocketDispatcher.read(Unknown Source) ~[na:1.7.0_25]
at sun.nio.ch.IOUtil.readIntoNativeBuffer(Unknown Source) ~[na:1.7.0_25]
at sun.nio.ch.IOUtil.read(Unknown Source) ~[na:1.7.0_25]
at sun.nio.ch.SocketChannelImpl.read(Unknown Source) ~[na:1.7.0_25]
at io.netty.buffer.UnpooledHeapByteBuf.setBytes(UnpooledHeapByteBuf.java:237) ~[netty-all-4.0.6.Final.jar:na]
at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:867) ~[netty-all-4.0.6.Final.jar:na]
at io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:227) ~[netty-all-4.0.6.Final.jar:na]
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:87) ~[netty-all-4.0.6.Final.jar:na]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:497) ~[netty-all-4.0.6.Final.jar:na]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:465) ~[netty-all-4.0.6.Final.jar:na]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:359) ~[netty-all-4.0.6.Final.jar:na]
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:101) ~[netty-all-4.0.6.Final.jar:na]
at java.lang.Thread.run(Unknown Source) ~[na:1.7.0_25]
The usual cause of this error is that you have written to a connection which had already been closed by the other end. In other words, an application protocol error. There are other causes, but this is the most common.
NB Netty has nothing to do with it.
Try check and catch exception before read. It helped me rid of that exception.
// Attempt to read off the channel
int numRead;
try {
numRead = socketChannel.read(this.readBuffer);
} catch (IOException e) {
// The remote forcibly closed the connection, cancel
// the selection key and close the channel.
key.cancel();
socketChannel.close();
return;
}
Related
Host : serverhost.example.com / 127.0.0.1
Port : 8082
API/Application : Google Chrome / Tomcat deployed application
Monitor : CPU = 35%
Memory = 30%
this is my code snippet :
String url = "service:jmx:rmi:///jndi/rmi://127.0.0.1:8082/jmxrmi";
JMXConnector jmxc = null;
try {
JMXServiceURL jmxSvcUrl = new JMXServiceURL(url);
System.out.println("~~~~~~~~~~~1~~~~~~~~~~~~~~");
jmxc = JMXConnectorFactory.connect(jmxSvcUrl, null);
System.out.println("~~~~~~~~~~~2~~~~~~~~~~~~~~");
MBeanServerConnection mbsc = jmxc.getMBeanServerConnection();
String domains[] = mbsc.getDomains();
Arrays.sort(domains);
for (String domain : domains) {
System.out.println( domain );
}
System.out.println("~~~~~~~~~~~3~~~~~~~~~~~~~~");
}catch(Exception ex){
ex.printStackTrace();
}finally {
if( jmxc != null )
try{jmxc.close();}catch(Exception ex){;}
}
and i got this error
java.io.IOException: Failed to retrieve RMIServer stub: javax.naming.CommunicationException [Root exception is java.rmi.ConnectIOException: error during JRMP connection establishment; nested exception is:
java.net.SocketTimeoutException: Read timed out]
at javax.management.remote.rmi.RMIConnector.connect(Unknown Source)
at javax.management.remote.JMXConnectorFactory.connect(Unknown Source)
at com.ms3.health.core.ResourceManagement.jmxSvcUrl(ResourceManagement.java:137)
at com.ms3.health.core.ResourceManagement.main(ResourceManagement.java:201)
Caused by: javax.naming.CommunicationException [Root exception is java.rmi.ConnectIOException: error during JRMP connection establishment; nested exception is:
java.net.SocketTimeoutException: Read timed out]
at com.sun.jndi.rmi.registry.RegistryContext.lookup(Unknown Source)
at com.sun.jndi.toolkit.url.GenericURLContext.lookup(Unknown Source)
at javax.naming.InitialContext.lookup(Unknown Source)
at javax.management.remote.rmi.RMIConnector.findRMIServerJNDI(Unknown Source)
at javax.management.remote.rmi.RMIConnector.findRMIServer(Unknown Source)
... 4 more
Caused by: java.rmi.ConnectIOException: error during JRMP connection establishment; nested exception is:
java.net.SocketTimeoutException: Read timed out
at sun.rmi.transport.tcp.TCPChannel.createConnection(Unknown Source)
at sun.rmi.transport.tcp.TCPChannel.newConnection(Unknown Source)
at sun.rmi.server.UnicastRef.newCall(Unknown Source)
at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
... 9 more
Caused by: java.net.SocketTimeoutException: Read timed out
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.socketRead(Unknown Source)
at java.net.SocketInputStream.read(Unknown Source)
at java.net.SocketInputStream.read(Unknown Source)
at java.io.BufferedInputStream.fill(Unknown Source)
at java.io.BufferedInputStream.read(Unknown Source)
at java.io.DataInputStream.readByte(Unknown Source)
... 13 more
please see my code snippet for more details. thanks and more power to everyone.
please let me understand what cause of my issues and how to deal with it.
please see my code snippet for more details. thanks and more power to everyone.
please let me understand what cause of my issues and how to deal with it.
I'm running into a java.net.SocketException (Permission denied: connect) when sending a lot of requests to a server. I've tried the -Djava.net.preferIPv4Stack=true option as mentioned in other threads.
This issue only occurs after a lot of connections have already been made. The following code can be used to reproduce the issue:
public class Example {
public static void main(String[] args) {
if(args.length == 1) {
System.out.println(args[0]);
for(int i = 0; i < Integer.MAX_VALUE; i++) {
requestURL(args[0]);
}
}
}
public static void requestURL(String targetUrl) {
URL url = new URL(targetUrl);
HttpURLConnection httpCon = (HttpURLConnection)url.openConnection();
httpCon.setDoInput(true);
BufferedReader rd = new BufferedReader(new InputStreamReader(httpCon.getInputStream()));
//handle response here
rd.close();
httpCon.disconnect();
}
}
The code will successfully send the requests until the Exception occurs. This has been verified in the server's log files.
Please run the sample code only against a server that you are permitted to, as it generates quite a bit of traffic / load on the server.
So the question now is: How to avoid that Exception? Or any workarounds? And what is the actually issue here?
EDIT
added httpCon.disconnect(). (doesn't solve the problem)
EDIT #2 (StackTrace)
java.net.SocketException: Permission denied: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.<init>(Unknown Source)
at sun.net.www.http.HttpClient.New(Unknown Source)
at sun.net.www.http.HttpClient.New(Unknown Source)
at sun.net.protocol.http.HttpURLConnection.getNewHttpClient(Unknown Source)
at sun.net.protocol.http.HttpURLConnection.plainConnect0(Unknown Source)
at sun.net.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
at sun.net.protocol.http.HttpURLConnection.connect(Unknown Source)
at Example.requestUrl(Example.java)
at Example.main(Example.java)
When the issue occurs no further requests are sent to the server (no log entries on the server and no SYN packets (sniffed with tcpdump)).
EDIT #3
I've forgotten to run the application with the -Djava.net.preferIPv4Stack=true argument.
It hasn't thrown an exception yet when using both, the aforementioned argument and the httpCon.disconnect() method.
Try to use httpCon.disconnect() to be sure to realease the socket after you finish to read the response.
im having a random error of could not send message. sometimes there's no error.
what might be the cause?? thanks.
Mar 06, 2014 6:11:13 AM org.apache.cxf.phase.PhaseInterceptorChain doDefaultLogging
WARNING: Interceptor for {XXX }SoapApiServiceHttpEndpoint#{XXX}createSession has thrown exception, unwin
ding now
org.apache.cxf.interceptor.Fault: Could not send Message.
at org.apache.cxf.interceptor.MessageSenderInterceptor$MessageSenderEndingInterceptor.handleMessage(MessageSenderInterceptor.java:64)
at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:262)
at org.apache.cxf.endpoint.ClientImpl.doInvoke(ClientImpl.java:531)
Caused by: java.net.SocketException: SocketException invoking : Connection reset
at sun.reflect.GeneratedConstructorAccessor2332.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
Caused by: java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(Unknown Source)
at java.net.SocketInputStream.read(Unknown Source)
at sun.security.ssl.InputRecord.readFully(Unknown Source)
Connection reset means that the client abnormally closed the connection and then cxf cannot read or write any further data to the stream. Take a look at following answers for more information:java.net.SocketException: Connection reset
I have a program which sometimes encounters the errorjava.net.SocketException. Is there a way I can have the client program execute some code if (and only if) it encounters this error in order to "deal with" the error? The full error is
java.net.SocketException: Software caused connection abort: socket write error
Here's a summary of what I have now.
public void run() {
try {
//some code that causes the SocketException
}
catch (SocketException e) {
System.out.println("I recognize the SocketException");
}
}
However despite the error it still won't print the line.
Here is the full error
java.net.SocketException: Software caused connection abort: socket write error
at java.net.SocketOutputStream.socketWrite0(Native Method)
at java.net.SocketOutputStream.socketWrite(Unknown Source)
at java.net.SocketOutputStream.write(Unknown Source)
at java.io.ObjectOutputStream$BlockDataOutputStream.drain(Unknown Source)
at java.io.ObjectOutputStream$BlockDataOutputStream.setBlockDataMode(Unknown Source)
at java.io.ObjectOutputStream.writeNonProxyDesc(Unknown Source)
at java.io.ObjectOutputStream.writeClassDesc(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.writeFatalException(Unknown Source)
at java.io.ObjectOutputStream.writeObject(Unknown Source)
at (...).java:61)
at (...).java:164)
It depends on whether the client or the server is the one throwing the exception.
Either way, you should just be able to add a try-catch block around the code.
try {
//code
} catch (SocketException e) {
// Handle the error
}
If the server is throwing the error and you want the client to handle the situation, the client should be throwing an exception due to the loss of connection (this is what this exception looks like). Alternatively, if the server throws an error but doesn't crash, just have the server send some signal to the client that an error occurred.
Either way, with a little more information, I could give you a better resposne.
I need sent some requests to server side and get reponse, sometimes when I call specific method to run the flollowing common code, I get one error in line(addToCookieJar(connection);), any idea how this get happened?
URL url = new URL(providerURL);
HttpURLConnection connection = (HttpURLConnection)url.openConnection();
connection.setRequestMethod("POST");
connection.setDoInput(true);
connection.setDoOutput(true);
connection.setUseCaches(false);
connection.setRequestProperty("Content-Type", "application/octet-stream");
// We understand gzip encoding
connection.addRequestProperty("Accept-Encoding", "gzip");
if (cookie != null && cookieHandler != null) {
connection.setRequestProperty("Cookie", cookie);
}
if (cookieHandler == null) {
addFromCookieJar(connection);
}
// Send the request
ObjectOutputStream oos = new ObjectOutputStream(connection.getOutputStream());
oos.writeObject(remote.getName());
oos.writeObject(m.getName()); // method name
oos.writeObject(m.getParameterTypes()); // formal parameters
oos.writeObject(args); // actual parameters
oos.flush();
oos.close();
if (cookieHandler == null) {
cookieJar.put(new URI(providerURL), connection.getHeaderFields());
}
Exception:
java.lang.reflect.UndeclaredThrowableException
at $Proxy0.updateDocument(Unknown Source)
at com.agst.ui.gantt.GanttPanel.doUpdateDocument(GanttPanel.java:1931)
at com.agst.ui.gantt.GanttPanel.save(GanttPanel.java:1419)
at com.agst.ui.gantt.GanttPanel$4.run(GanttPanel.java:1673)
at java.lang.Thread.run(Unknown Source)
Caused by: java.net.SocketException: Connection reset
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection$6.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.net.www.protocol.http.HttpURLConnection.getChainedException(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at com.agst.rmi.RemoteCallHandler.call(RemoteCallHandler.java:196)
at com.agst.rmi.RemoteCallHandler.invoke(RemoteCallHandler.java:142)
... 5 more
Caused by: java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(Unknown Source)
at java.io.BufferedInputStream.fill(Unknown Source)
at java.io.BufferedInputStream.read1(Unknown Source)
at java.io.BufferedInputStream.read(Unknown Source)
at sun.net.www.http.HttpClient.parseHTTPHeader(Unknown Source)
at sun.net.www.http.HttpClient.parseHTTP(Unknown Source)
at sun.net.www.http.HttpClient.parseHTTP(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getHeaderFields(Unknown Source)
at com.agst.rmi.RemoteCallHandler.addToCookieJar(RemoteCallHandler.java:529)
at com.agst.rmi.RemoteCallHandler.call(RemoteCallHandler.java:192)
... 6 more
This error indicates that the remote side has closed the connection while your side was still trying to read from it. You should check if
there is a problem on the server (check it's logs) or
you are trying to read more data than the server supplies
What does the addToCookieJar method do? Passing in the connection object might be a problem to this method since you close the OutputStream obtained from the connection. Are you by any chance trying to retrieve and operate on the output stream object in the addToCookieJar method?